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2 years ago

What was the hiker's average velocity during part C of the hike?

Chemistry

1 answer:

umka2103 [35]2 years ago

6 0

Answer:

0.13 km/min west

Explanation:

I just did the test.

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A first order reaction has a rate

EleoNora [17]

Answer:

one-half

Explanation:

cuz for a first order reaction is a half life independent of concentration and constant over time

4 0

3 years ago

What volume (in mL) of a 0.113 M NaCl solution contains 0.087 mol NaCl?

Helen [10]

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5 0

3 years ago

A student was given a solid containing a mixture of nitrate salts. The sample completely dissolved in water, and upon addition o

finlep [7]

Answer:

Explanation:

The nitrates of Bi,Sn and Cd is ruled out because their sulfides are insoluble in acidic medium.

Nitrates of Ni or Co may be present because their sulfides are insoluble in basic medium. The presence of other nitrates are ruled out.

5 0

3 years ago

Modern pennies are composed of zinc coated with copper. A student determines the mass of a penny to be 2.483 g and then makes se

Aleonysh [2.5K]

Answer:

97.1%

Explanation:

Using the ideal gas equation, the number of moles of hydrogen gas produced can be calculated from information provided about the volume of gas evolved at a given temperature and pressure.

The stoichiometry of the reaction is now used to obtain the number of moles of Zn that will produce a given number of moles of hydrogen from the balanced reaction equation as shown. This gives us the number of moles of zinc reacted hence the mass of zinc in the coin since it is assumed that all the zinc reacts.

This is now used to calculate the mass percentage of Zn as shown.

3 0

3 years ago

If earth is 1.50 x 10^8km from the sun what is the distance in Mm?

Readme [11.4K]

The distance of the earth to the sun in Mm = 1.5 x 10⁵

<h3>Further explanation</h3>

Given

The distance of the earth to the sun : 1.50 x 10⁸ km

Required

The distance in Mm

Solution

In converting units we must pay attention to the conversion factor.

the conversion factor :

1 kilometer(km) = 10⁻³ megameter(Mm)

So the distance conversion :

1.5 x 10⁸ x 10⁻³ = 1.5 x 10⁵ Mm

8 0

3 years ago